On September 3, 2016, a magnitude 5.6 earthquake that occurred in Pawnee, Oklahoma, was recorded by Weston Observatory (see seismogram below). This earthquake is tied with another magnitude 5.6 earthquake in Prague, OK (November 6, 2011) as the two largest known earthquakes in Oklahoma.
For more information about the effects of this earthquake, see:
Visit @Weston_Quakes on Twitter for updates on this earthquake.
Additional information about this earthquake can also be found on the U.S. Geological Survey earthquake monitoring web site.